update test data snapshot again for names-store format changes
improve handling of error conditions in HashStore perl
make JS side of hash-store support configurable hash sizes
tweak generate-names.pl to aim for about 10 names per hash bucket.  add an intentionally-undocumented --hashBits commmand-line option
tweak it back to about 50 names per hash bucket
get name searches to show the relevant track if necessary again